76077

But it would have been cylinder oil which would have been subjected to superheated steam anyway. Steam jacketing would also have allowed a relatively lower level of superheating.

 

Wow , and i thought my input was only tenuously relevant...

 

As you can see, I was only responding to a previous post.

 

Let's get back to the Toddington Standard, 76077.

 

There will be a press release very soon bringing people up to date but as a general idea, we are now going to replace the copper doorplate due to very poor repairs and stays at maximum size. Eastleigh reamed every stay out to maximum to try and combat star cracking, which is still evident. The c107 copper has been ordered and will arrive in January being delivered to heritage boiler services. They have already previously produced two copper backheads for standard tanks and we are indebted to the Nymr for the use of there former as Luckily the std mogul and std tank copper doorplates are nigh on the same. Additionally we are looking at a 3/4 new steel back head due to stay size and multiple fatigue cracks. sadly there is no former for this as it is different from both a tank and 75xxx. Options are being looked into as we speak.
we will probably end up with a 60% new boiler. Not the best news but we know it’s the right thing to do and end up with a reliable boiler. In other work recently, the two new sand boxes have been completed, the rhs cylinder drain cock pipework finished and under the cab we’ve started to look at the injector water valve operating rods and brackets amongst lots of little other pipe clips and
clamps.

 

Even better.
Rebuild a 9f as 4-8-0 and better all 4-6-2s

Chapelon 240P-overlay(4) by Hermod posted Apr 1, 2022 at 8:41 PM

 

One method of treating Star Cracking in Rails is to use Cold Bolt Hole Expansion.
Could this be used instead?
https://www.hirdraildevelopment.com/products/bolt-hole-crack-prevention-cbx/

 

I think the issue is that the repair we’ve opted for builds life into the boiler and whilst it’s heavily dismantled the chance to do it properly is uppermost. When built steel stays start at 5/8 and once you have opened the holes put to a certain point (I think 7/8? You move over to copper as the steel are at there max size. This then goes for copper and again once you up at 1 3/16” (again I think this is the figure) you’re a bit stuffed. By putting new plate work in, we can go back to 5/8 steel stays. The other issue if you haven’t kept up on our boiler is the laminations in the steel, there from the day it was rolled in 1952. The boiler inspector has said replacing as much with new material is the best way forward as it eliminates future problems. Yes it’s going to cost a lot more, the copper alone is over £35,000 but that’s all already ordered and paid for!

 

Should add we’ve done well with over 220k raised for the boiler but we would give anyone a big welcome if interested in wanting to get involved or buying shares. Email info@standard76077.com

 

You want a 9F rebuilt as a 4-6-2? - you mean like this one?


Peter

 

Very nice picture and where is it?
I have dreamt of winning Lotto and then rebuild a 9F as 4-8-0 and run it over some hills.
It could be nice racing against 4-6-2s,but I evidently did not explain it very clear.
If it was a big win I would also build a Chapelon 4-8-0 but as three-cylinder compound.
That is my vision of paradise.

 

The Great Hall of the NRM at York. Taken in January 2012, visiting No 70000 spent about 4 weeks on display alongside permanent resident No 92220. It provided a unique opertunity to see the first and 999th (and last) built BR Standard locotives alongside each other.

Anyway back to the BR Standard that is the topic of this thread

Peter

 

Factually correct about about the 999th Standard, but the 1000th is just around the corner so maybe not the last. ‍

 

A new firebox would have had 1/2" steel stays, at least on the GWR/WR. A change to copper was made at 3/4"; steel at this size will burn away and is not sufficiently flexible. Above this the limiting factor would probably be the state of the inner sides of the outer firebox. The sides/ends would be replaced and a new inner firebox fitted.




ed.

 

76077's initial firebox stays are 11/16" or 3/4" dia monel stays with some 7/8" dia copper stays used, as well.

 

That you, I was dredging up stuff I’ve heard and maybe mixing up with gwr !

 

Thankyou, I’m not a boiler engineer so was going from memory. We have records for boiler no.1052 but the wording is quite vague and doesn’t show the whole picture of what was done.

 

Monel is tough stuff to machine. In about 1985 I made about 700 stays for 6106 using a Maiden Screwing Machine (I kid you not!) ex-Reading Signal Works. Using cutting fluid, every set of cutters that came with the machine were blunted. The monel cost about £2k - I dread to think what it would cost today

.

 

On finding one of my monel stays, 5/8" is probably the initial size for a new firebox, not 1/2". 6106 was selected for preservation because it had an almost new firebox. Unfortunately the GWS had left the boiler too long with water in it and all the steel stays were corroded away at the inner firebox end.

 

A more detailed explanation (with a few black museum photos) derived from the presentation given at the AGM has appeared on the 76 website.
https://standard76077.com/boiler-update-december-2025-a-nightmare-before-christmas/